23240131421 has 16 divisors (see below), whose sum is σ = 25455297840. Its totient is φ = 21086507520.

The previous prime is 23240131391. The next prime is 23240131423. The reversal of 23240131421 is 12413104232.

It can be written as a sum of positive squares in 8 ways, for example, as 8102520196 + 15137611225 = 90014^2 + 123035^2 .

It is not a de Polignac number, because 23240131421 - 2⁶ = 23240131357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23240131423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270025 + ... + 1288193.

It is an arithmetic number, because the mean of its divisors is an integer number (1590956115).

Almost surely, 2^23240131421 is an apocalyptic number.

It is an amenable number.

23240131421 is a deficient number, since it is larger than the sum of its proper divisors (2215166419).

23240131421 is a wasteful number, since it uses less digits than its factorization.

23240131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19856.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 23240131421 its reverse (12413104232), we get a palindrome (35653235653).

The spelling of 23240131421 in words is "twenty-three billion, two hundred forty million, one hundred thirty-one thousand, four hundred twenty-one".